(AP) -- The woman who flew from San Jose to Los Angeles without a boarding pass was a homeless loner who was briefly ordered into mental treatment earlier this year because of her past attempts to sneak aboard flights, officials said.

Marilyn Jean Hartman - who tried to sneak aboard flights at least a half-dozen times in the past - made at least three attempts on Monday before she finally went past a screener who was busy checking a family's documents at Mineta San Jose International Airport, according to law enforcement officials, who would speak only on condition of anonymity because the security breach is being investigated.

Hartman, 62, then went through the electronic screening process before entering an airport terminal. Authorities said she made it through screening because she had no prohibited items on her or in her purse.

Her boarding status was discovered once Southwest Airlines Flight 3785 landed in Los Angeles, the officials said.

On Wednesday, Hartman was ordered to 24 months' probation after she pleaded no contest to willfully and unlawfully entering the city as a stowaway on an aircraft, a misdemeanor. Hartman also was ordered to stay away from Los Angeles International Airport unless she has a ticket to board a flight.

She smiled as she left court and told reporters she regretted what she did, and vowed never to board a plane without a ticket.

"It was stupid, and it is something that I don't want to repeat," Hartman said.

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